#genus_Erethizon__Erethizon  a genus of Erethizontidae
  supertype:  mammal_genus  a genus of mammals
  member of:  family_Erethizontidae
  member:  Canada_porcupine__Erethizon_dorsatum  porcupine of northeastern North America with barbed spines concealed in the coarse fur; often gnaws buildings for salt and grease

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